Surface configuration of a wristwatch



FIG. 1 is a front view of a surface configuration of a wristwatch according to my novel design;

FIG. 2 is a right side view of a surface configuration of the wristwatch according to my novel design; and,

FIG. 3 is a perspective view of a surface configuration of the wristwatch according to my novel design.

The dash lines included depict environment and are not part of the claimed design. 

The ornamental design for a surface configuration of a wristwatch, as shown and described. 